DEDE had conducted research, design, and construction of a prototype Net Zero Energy building. This six-story office building has a total area of 2,650 square meters and was designed according to government green building standards (G-GOODs) under the concept of “Energy Reduction, Life Quality Enhancement.”

        The building incorporated “Passive Design” principles, which aligned the structure with environmental conditions, as well as “Active Design” that ensured energy sustainability through the building’s structural elements. Renewable energy was harnessed through a 100 kW solar panel system installed on the roof, capable of generating approximately 145,000 kWh/year, meeting 92.9% of the building’s energy requirements (Figure 4.2 - 4.3).

        The interior featured various energy-controlling and energy-saving equipments, including high-efficiency LED lighting systems with light intensity sensors and occupancy detection to control switching and adjust illumination levels accordingly. The building employed Variable Refrigerant Flow air conditioning systems that work in conjunction with carbon dioxide (CO₂) sensors to supply fresh air in optimal amounts for comfort. PM 2.5 dust sensors also help improving indoor air quality for the wellbeing of building occupants.

        The DEDE 70th Anniversary Building officially opened on December 8, 2023, and standed as the country’s largest net zero energy building in terms of usable space. It had been certified at the Platinum level under the Thai’s Rating of Energy and Environmental Sustainability for New Construction (TREES-NC) standard. The operational outcomes and building usage will serve as a prototype for the study and future development of other net zero energy buildings